Unary Operators (Transact-SQL)

Unary operators perform an operation on only one expression of any one of the data types of the numeric data type category. For more information about data type categories, see Transact-SQL Syntax Conventions.

The + (Positive) and - (Negative) operators can be used on any expression of any one of the data types of the numeric data type category. The ~ (Bitwise NOT) operator can be used only on expressions of any one of the data types of the integer data type category.